Helmet-mounted display system comprising a device for aligning and retracting the display device

Abstract

A helmet-mounted display systems includes a front mechanical arch comprising a display device and a means for holding and adjusting the display device in the vertical plane, the means consisting of a first vertical support surface comprising an oblong port and a screw/spring assembly, the screw passing through the oblong port and being fastened in a mechanical structure of the display device, the display device being capable of rotating in such a way as to make it retractable. The display system comprises a means for roll adjustment and repositioning of the display device, the adjustment means consisting of a second vertical support surface, normal to the first support surface, and a knurl screw attached to the mechanical structure of the display device, the end of the screw resting on the second support surface when the display device is in the use position.

The invention claimed is: 
     
       1. A helmet-mounted display system comprising a helmet shell and a mechanical arch mounted on a front part of said shell, the mechanical arch comprising:
 a fixed position detection device; 
 a display device; 
 a means for holding and adjusting the display device in a vertical plane, said holding and adjustment means comprising:
 a first vertical support surface disposed in a front part of the arch and at right angles to a sagittal plane of the shell, said first vertical support surface comprising an oblong port; and 
 a screw-spring assembly which ensures fixing and adjustment of the display device on the first vertical support surface, the screw-spring assembly passing through the oblong port and being fixed in a mechanical structure of the display device, the display device being able to rotate with friction about an axis of the screw-spring assembly so as to make it retractable; 
 
 wherein the display system comprises a means for roll adjustment and repositioning of the display device, said adjustment and repositioning means comprising:
 a second vertical support surface, normal to the first vertical support surface; 
 a knurled screw with a spherical end attached to the mechanical structure of the display device, an axis of the knurled screw being at right angles to the axis of the screw-spring assembly and in a horizontal plane, the spherical end resting on the second vertical support surface when the display device is in its position of use. 
 
 
     
     
       2. The helmet-mounted display system as claimed in  claim 1 , wherein the mechanical arch comprises an electrical system for detecting contact of the knurled screw with the second vertical support surface. 
     
     
       3. The helmet-mounted display system as claimed in  claim 1 , wherein the mechanical arch comprises a mechanical system for locking the knurled screw on the second vertical support surface. 
     
     
       4. The helmet-mounted display system as claimed in  claim 1 , wherein the mechanical arch comprises a magnetization-based system for locking the knurled screw on the second vertical support surface. 
     
     
       5. The helmet-mounted display system as claimed in  claim 1 , wherein the display device comprises an optical combiner with pupil expansion. 
     
     
       6. The helmet-mounted display system as claimed in  claim 1 , wherein the position detection device is a camera optical device. 
     
     
       7. The helmet-mounted display system as claimed in  claim 1 , wherein the helmet-mounted display device comprises a display, the helmet-mounted display system comprises a graphic computer comprising a function for dimensioning a size of image as a function of inclination of the display device when the display device is in its position of use. 
     
     
       8. The helmet-mounted display system as claimed in  claim 1 , wherein the display system comprises a movable visor mounted on the mechanical arch, said visor covering the display device in lowered position and being situated on top of the shell in raised position. 
     
     
       9. The helmet-mounted display system as claimed in  claim 1 , wherein the mechanical arch comprises fixing means for a binocular support.